A dry lake is an ephemeral lakebed, or a remnant of an endorheic lake. Such flats consist of fine-grained sediments infused with alkali salts. Alternative names for the dry lake include alkali flat, alkali sink and playa.
A playa lake may cover a wide area, but it is never deep. Most water in it evaporates, leaving a layer of salt on the surface. These salt covered stretches are called saltpans.
If its basin is primarily salt then the dry lake is called a salt pan, pan, hardpan, or salt flat (the latter is a remnant of a salt lake). Other dry lake types include the sabkha and the mudflat.